Cask or vessel for ignitible or explosive liquids or gases.



No. 813,365. PATENTED FEB. 20, 1906.

W. DREYER.

GASK OR VESSEL FOR IGNITIBLE 0R EXPLOSIVE LIQUIDS 0R GASES.

APPLIOATION FILED AUG. 10, 1905.

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WILHELM DREYER, OF BAD ROTHENFELDE, GERMANY.

CASK 0R VESSEL FOR IGNITIBLE OR EXPLOSIVE LIQUIDS OR GASES.

Specification of Letters Patent.

Patented Feb. 20, 1906.

Application filed August 10, 1905. Serial No. 273,679.

To all whom, it may concern.-

Be it known that I, W'ILHELM DREYER, director of a company, a citizen of the German Empire, residing at Bad Rothenfelde, Ger many, have invented certain new and useful Improvements in Casks or Vessels for Ignitible or Explosive Liquids or Gases, of which the following is a specification.

The present invention relates to casks, cans, or any other vessel for containing ignitible or explosive liquids or gases, and has for its object to prevent the explosion of such casks and the like which generally takes place when a flame has access to the contents and when the velocity of the gases leaving the cask is smaller than the velocity with which the flame returns into it. \Vire nets or sievecylinders or the like have been made use of (in accordance with Davys safety-lamp) for pre venting such explosions, but in many cases have proved to be a failure. Closed protecting-cylinders consisting of a number of rings with zigzag or broken channels are comparatively large and heavy and very expensive and therefore only suited for large storecasks. It being necessary that these protecting-cylinders extend through the whole cask and the channels being uniformly distributed over the entire length of the cylinder, the further disadvantage has arisen with the said contrivances that when the cask is to be emptied the contents can flow off only through that part of the zigzag channels which is still covered by the liquid. The more the level of the latter descends the less channels remain available for this purpose until the remainder drops only through a small number of channels. All these disadvantages are avoided by the present invention, which con sists in a number of rings being kept together by means of bolts and between each two of such rings being interposed small thin plates leaving slitlike openings between the rings. Through these slits the liquid may well flow off, whereas it is impossible for the flame to pass to the interior of the cask. The new device has a very small weight and size and is very cheap, may be arranged with equal success with the largest store-cask or with the smallest petroleum-can or even with the liquid vessel of any lamp.

The invention is represented, byway of example, on the accompanying drawings in two modified forms.

Figure 1 is a vertical sectional view through a protecting device applicable to a large tapping-hole. Fig. 2 is a horizontal sectional View thereof. Fig. 3 is a part of a vertical sectional view of a store or transport cask provided with the new device, but serving at the same time for emptying the cask by means of a hand-pump or the like.

Referring to Figs. 1 and 2, the cask is provided with a bushing a, of any construction, between which and the unperforated bottom 1) thereof are interposed a number of thin rings 0, of metal or any other suitable material. The inner width or area corresponds to the size of the opening of the cask. Between these rings 0 small plates 0, of a suitable material, are arranged, which serve for keeping the rings 0 an equal dis. tance apart. Between each two of the rings 0, therefore, a ring or slit-like opening of the thickness of the plates 6 is formed. All the rings 0 and plates 6 and the bottom 1) are held together and fastened to the bushing a by means of bolts d, so that the ring-like openings cannot be altered. The total area of these openings should be at least as large as the size of the opening of the cask. Whereas the gases or liquids may thus enter the cask with out hindrance, it is impossible for the flame burning backward to penetrate through the openings between the rings on account of the small height of the said openings and of the long way the flame has to pass in consequence of the thick rings 0. By the employment of thicker or thinner plates 0 the openings between the rings 0 may be made to correspond with the explosive character of the ignitible liquids or gases, so that even non-luminous oxygen-hydrogen cannot pass the openings in a burning state.

Referring to Fig. 3, the bottom of the cask is provided with a similar protecting device 9 as arranged at the top opening. Both devices are communicating with each other by means of a pipe h, so that the suction-pipe of a pump may be inserted up to the bottom. Further, the liquid may pass both ways in and out through the lower and in the same manner the air through the upper device.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is- 1. A device of the class described, includ ing a plurality of annular sections having central openings, space members interposed between said sections to form openings therebetween, a bushing having an opening corre- ICO IIO

spondingto the central openings of the anrings and engaging the closing device for connular sections, and means for securing the necting said rings to said bushing.

said bushing and annular sections together. In testimony whereof I have hereunto set 2. In a receptacle, a vbushing having an my hand in the presence of two subscribing opening therethrough, a plurality of rings witnesses.

having central openings corresponding to the opening in the bushing, a series of rings interposed between the first-mentioned rings for Witnesses:

separating the same a distance from one an- HENRY J. F LLER, 10 other, and means passing through the several LEONORE RAscH.

WILH. D'RE YER. 

